and yield a result of the same type as the operands.
The left operand is evaluated, and then the right if the condition requires it.
</p>

<pre class="grammar">
&amp;&amp;    conditional AND    p &amp;&amp; q  is  "if p then q else false"
||    conditional OR     p || q  is  "if p then true else q"
!     NOT                !p      is  "not p"
</pre>